Mountain truss type wind power structure and mounting method thereof

Abstract

The mountain truss type wind power structure comprises a truss structure, the top of the truss structure is fixedly connected with a fan sleeve, and the bottom of the truss structure is fixedly connected with a fan foundation. The truss structure is sequentially composed of a vertical layer composed of a vertical structure, a cambered surface layer composed of an arc-shaped structure and a base layer from top to bottom, the vertical layer comprises a plurality of vertical truss units, the cambered surface layer comprises a plurality of arc-shaped truss units, the vertical layer, the cambered surface layer and the base layer are sequentially connected and assembled, and the arc-shaped truss units are connected with the arc-shaped truss units. The base layer comprises four obliquely-arranged supporting stand columns, the stand columns on the four sides of the middle section of the truss structure are designed in a reverse arc section mode, the gravity center of the structure is lowered, the bending moment effect is greatly reduced, horizontal loads can be effectively transmitted to the two ends, and the reliability of the structure is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine foundation installation, and in particular to a mountain truss type wind power structure and an installation method thereof. Background Art

[0002] Wind power projects use wind power to generate electricity. The construction site is far away from residential areas. They have the characteristics of high power generation efficiency, clean and environmentally friendly, and small footprint. The wind turbine superstructure currently usually uses a steel tower or reinforced concrete tower. The construction technology of this structure is mature, but the tower uses a large amount of steel, and the transportation cost is high and the efficiency is low; Patent CN206617282U designs a semi-truss wind turbine tower, which reduces the tower length and transportation costs. However, the structure has a sudden change in the connection section between the tower and the truss, which is prone to stress concentration and poses strength and stability risks. In addition, the upper tower section is heavy and the lower truss section is at risk of instability. Patents CN118934473A, truss tower and wind turbine set, CN112922785A, truss tower and wind turbine set, CN211852056U, tower assembly and wind turbine for wind turbine, all disclose a truss tower wind turbine structure. However, the transition sections from top to bottom of the above structures have mutations, and the center of gravity of the overall structure is relatively high. The truss will bear large horizontal loads and bending moments, posing hidden dangers. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, a mountain truss wind power structure and an installation method thereof are provided to solve the problems in the prior art of low installation and transportation efficiency, high center of gravity of the structure, and the truss being subjected to large horizontal loads and bending moments.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mountain truss wind power structure and its installation method, including a truss structure, a wind turbine sleeve is fixedly connected to the top of the truss structure, and the bottom of the truss structure is fixedly connected to the wind turbine foundation. The truss structure is layered from top to bottom, including a vertical layer located at the upper part of the overall truss structure, a curved layer located in the middle section of the overall truss structure, and a base layer located at the bottom of the overall truss structure. The vertical layer is composed of a plurality of vertical truss units, and the curved layer is composed of a plurality of arc-shaped truss units. The vertical layer, the curved layer and the base layer are spliced ​​and assembled in sequence, and the base layer includes four inclined support columns.

[0005] Preferably, the vertical truss unit comprises four vertical columns arranged at four corners, the vertical columns are fixedly connected by a cross bar, and a plurality of vertical truss units are spliced ​​up and down to form a vertical layer, and the top of the vertical layer is fixedly connected to the fan sleeve.

[0006] Preferably, the arc-shaped truss unit comprises four arc-shaped columns, and cross bars are fixedly connected between the arc-shaped columns. The arc-shaped truss units are spliced ​​and assembled up and down to form an arc-shaped layer with an integrated arc surface.

[0007] Preferably, the curved surface layer is composed of four curved truss units, and the arc segment angle of each curved truss unit is equally divided to form an angle with the horizontal surface.

[0008] Preferably, the tops and bottoms of the vertical columns, curved columns and supporting columns in the vertical layer, curved layer and base layer are all provided with an integrally molded annular steel plates, and threaded holes are opened on the annular steel plates for connection and assembly.

[0009] Preferably, the truss units in the vertical layer, the curved surface layer and the base layer are fixedly connected by welding.

[0010] Preferably, a plurality of diagonal braces are provided between the vertical truss units, the arc-shaped truss units and the supporting columns and each independent truss unit.

[0011] Preferably, the top of the uppermost vertical truss unit on the vertical layer is fixedly connected to the fan sleeve via a plurality of connecting rods, and an operation and maintenance ladder is provided at the bottom center of the fan sleeve.

[0012] In addition, the present invention also discloses a method for installing the mountain truss wind power structure, which comprises the following steps: S1. Cast a number of vertical truss units, curved truss units and four supporting columns, and transport them to the installation site for assembly; S2. First, pour the foundation of the wind turbine at the construction site, and then install the four supporting columns at an angle of 60 degrees to the ground. During installation, the four supporting columns should be tilted in the same direction and all should be set toward the center point of the bottom of the wind turbine tower; S3. Assemble various truss units at the construction site, including vertical truss units and arc truss units, jack or hoist the assembled truss units to a truss unit height using a crane or a jacking device, and sequentially install a number of vertical truss units and a number of arc truss units from top to bottom. The arc surfaces of the arc truss units from top to bottom together form an anti-arc segment, and the anti-arc segment forms an angle of 30 degrees with the horizontal plane, which can be fixed by welding or bolts during installation; S4, after assembling one truss unit, continue to lift or hoist it to a height greater than one truss unit, assemble the second truss unit below the first truss unit, and repeat the above steps to complete the assembly of the truss units in sequence; S5 After the truss unit is assembled from top to bottom, the height of the truss structure is adjusted under the action of the jacking device or the lifting device, and the tops of the four supporting columns at the bottom are aligned and assembled with the bottom of the arc-shaped truss unit, thereby completing the assembly of the wind turbine truss.

[0013] Beneficial effects of the present invention: This application adopts steel structure as a whole, and the truss design ensures that the amount of steel used is small, the dead weight is reduced, and the construction cost is controlled; the truss structure is easy to install and transport, which improves the installation and transportation efficiency; the four side columns of the middle section of the truss structure are designed as anti-arc sections, which lowers the center of gravity of the structure, greatly reduces the bending moment, and can effectively transfer the horizontal load to both ends, thereby improving the structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the truss structure of the present invention; Figure 2 It is a schematic diagram of the vertical layer structure of the present invention; Figure 3 This is a schematic diagram of the structure of the curved surface layer of the present invention; Figure 4 This is a schematic diagram of the base layer structure of the present invention; Figure 5 A top view of the connection between the truss and the wind turbine tower of the present invention; Figure 6 A top view of the truss structure of the present invention; Figure 7 This is a diagram showing the connection between the support column and the fan foundation of the present invention; In the figure: 1. Truss structure; 2. Vertical layer; 3. Arc layer; 4. Base layer; 5. Fan sleeve; 6. Cross bar; 7. Diagonal brace; 8. Operation and maintenance ladder; 9. Connecting rod; 21. Vertical truss unit; 211. Vertical column; 31. Shaped truss unit; 311. Arc column; 41. Support column. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] like Figure 1-4 and Figure 7As shown, a mountain truss wind power structure and an installation method thereof include a truss structure 1, wherein a wind turbine sleeve 5 is fixedly connected to the top of the truss structure 1, and the bottom of the truss structure 1 is fixedly connected to the wind turbine foundation. The truss structure 1 is layered from top to bottom, including a vertical layer 2 located at the upper part of the overall truss structure 1, a curved layer 3 located in the middle section of the overall truss structure 1, and a base layer 4 located at the bottom of the overall truss structure 1. The vertical layer 2 is composed of a plurality of vertical truss units 21, and the curved layer 3 is composed of a plurality of arc-shaped truss units 31. The vertical layer 2, the curved layer 3 and the base layer 4 are spliced ​​and assembled in sequence, and the base layer 4 includes four inclined supporting columns 41. In this embodiment, the overall truss structure 1 is divided into three areas from top to bottom, which are respectively A vertical layer 2 composed of units, the top of the vertical layer 2 is fixedly connected to the fan sleeve 5 to ensure the stability of the fan sleeve 5. In this embodiment, the vertical layer 2 is preferably composed of two vertical truss units 21; and a curved surface layer 3 composed of a plurality of curved truss units 31, the curved surface layer 3 is preferably composed of four curved truss units 31, and the four arc segments formed by the four curved truss units 31 together constitute an anti-arc segment, and the arc segment angle of each curved truss unit 31 is evenly divided, and the overall anti-arc segment forms an angle of 30 degrees with the horizontal plane. When the total height of the curved surface 3 is 80m, the arc segment radius is 160m, and the length of each arc truss unit 31 can be calculated. In this embodiment, the tower structure is divided into 7 layers, which are installed layer by layer. In actual installation, the layers can be added according to different needs. The height of each layer in this application is preferably 15-20m.

[0017] Preferably, if Figure 2 As shown, the vertical truss unit 21 includes four vertical columns 211 arranged at four corners, the vertical columns 211 are fixedly connected by cross bars 6, and several vertical truss units 21 are spliced ​​up and down to form a vertical layer 2, and the top of the vertical layer 2 is fixedly connected to the fan sleeve 5. In this embodiment, the vertical truss unit 21 is composed of four vertical columns 211 arranged at four corners, and the vertical columns 211 are fixedly connected by cross bars 6. When installed, a unit surface is formed between two adjacent vertical columns 211, and the overall vertical truss unit 21 forms a cubic multi-faceted structure. This structure is the basic design of this application. The arc truss unit 31 and the supporting columns 41 in this application are all arranged at four corners.

[0018] Preferably, if Figure 3 The arc truss unit 31 includes four arc columns 311, and the arc columns 311 are fixedly connected with cross bars 6. The arc truss units 31 are spliced ​​and assembled up and down to form an arc layer 3 with an integrated arc surface. In this embodiment, the top and bottom of the arc columns 311 are all circular in cross section.

[0019] Preferably, if Figure 2-4As shown, the arc layer 3 is composed of four arc truss units 31, and the arc segment angle of each arc truss unit is equally divided, and together form an angle of 30 degrees with the horizontal plane. In this embodiment, the arc truss units 31 are composed of four arc columns 311, and the arc columns 311 are fixedly connected by cross bars 6. In this embodiment, the arc truss units 31 are preferably four, which are connected from top to bottom to form an arc layer 3 with an integrated arc surface.

[0020] Preferably, the tops and bottoms of the vertical columns 211, the curved columns 311 and the supporting columns 41 in the vertical layer 2, the curved layer 3 and the base layer 4 are all provided with an integrally molded annular steel plates, and threaded holes are provided on the annular steel plates for connection and assembly. This embodiment is the first embodiment of the connection relationship between layers. Conventional multi-layer trusses are connected by flanges. In view of improving the stability between the layers, this embodiment produces the annular steel plates (flanges) together with the columns by an integral casting method. The truss structure is installed by direct splicing to save construction time and improve stability at the same time.

[0021] Preferably, each truss unit in the vertical layer 2, the curved layer 3 and the base layer 4 is fixedly connected by welding. This embodiment is the second embodiment of the connection relationship between layers. In this embodiment, welding can be selected as the connection method. This installation method can ensure the stability of the overall truss structure 1 while saving costs.

[0022] Preferably, the vertical truss units 21, the arc-shaped truss units 31 and the supporting columns 41 are provided with a plurality of diagonal braces 7 between each independent truss unit. In the present embodiment, the overall truss structure 1 has seven layers, and each individual truss unit is a layer. The four sides of each layer are cross-arranged with diagonal braces 7. The cross-arranged diagonal braces 7 are welded or hinged to the column structure, and the intersection of the diagonal braces 7 is hinged or welded and fixed with bolts.

[0023] Preferably, if Figure 5 , 6 As shown, the top of the vertical truss unit 21 located at the top of the vertical layer 2 is fixedly connected to the fan sleeve 5 by a plurality of connecting rods 9, and an operation and maintenance ladder 8 is arranged at the center of the bottom of the fan sleeve 5. In this embodiment, the outer periphery of the wind turbine tower 5 is fixed by a plurality of connecting rods 9. During installation, the diagonal braces 7 and the cross bars 6 can be installed on the top of the four-sided columns of the top layer (top layer) of the truss for further fixing. An operation and maintenance ladder 8 is arranged at the bottom of the fan sleeve 5. The operation and maintenance ladder 8 is the same as the tower, and is spliced ​​in layers, extending all the way to the ground.

[0024] In addition, the present invention also discloses a method for installing the mountain truss wind power structure, which comprises the following steps: S1, casting a plurality of vertical truss units 21, arc truss units 31 and four supporting columns 41, and transporting them to the installation site to wait for assembly; S2. First, pour the foundation of the wind turbine at the construction site, and then install the four supporting columns 41 at an angle of 60 degrees to the ground. During installation, the four supporting columns 41 are tilted in the same direction and are all set toward the bottom center point of the wind turbine tower 5; S3, assembling various truss units at the construction site, including vertical truss units 21 and arc truss units 31, jacking or hoisting the assembled truss units by a truss unit height using a crane or a jacking device, and sequentially installing a plurality of vertical truss units 21 and a plurality of arc truss units 31 from top to bottom, wherein the arc surfaces of the arc truss units 31 from top to bottom together form an anti-arc segment, and the anti-arc segment forms an angle of 30 degrees with the horizontal plane, and can be fixed by welding or bolts during installation; S4, after assembling one truss unit, continue to lift or hoist it to a height greater than one truss unit, assemble the second truss unit below the first truss unit, and repeat the above steps to complete the assembly of the truss units in sequence; S5 After the truss unit is assembled from top to bottom, the height of the truss structure is adjusted under the action of the jacking device or the lifting device, and the top of the four supporting columns 41 at the bottom is aligned with the bottom of the arc truss unit 31 to complete the assembly of the wind turbine truss.

[0025] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A mountain truss wind power structure and an installation method thereof, comprising a truss structure (1), the top of the truss structure (1) being fixedly connected to a wind turbine sleeve (5), the bottom of the truss structure (1) being fixedly connected to a wind turbine foundation, characterized in that: The truss structure (1) is layered from top to bottom, including a vertical layer (2) located at the upper part of the overall truss structure (1), a curved layer (3) located in the middle of the overall truss structure (1), and a base layer (4) located at the bottom of the overall truss structure (1), wherein the vertical layer (2) is composed of a plurality of vertical truss units (21), and the curved layer (3) is composed of a plurality of arc-shaped truss units (31). The vertical layer (2), the curved layer (3) and the base layer (4) are spliced ​​and assembled in sequence, and the base layer (4) includes four inclined support columns (41).

2. A mountain truss wind power structure and installation method thereof according to claim 1, characterized in that: The vertical truss unit (21) comprises four vertical columns (211) arranged at four corners, the vertical columns (211) are fixedly connected via a crossbar (6), a plurality of vertical truss units (21) are spliced ​​up and down to form a vertical layer (2), and the top of the vertical layer (2) is fixedly connected to the fan sleeve (5).

3. A mountain truss wind power structure and installation method thereof according to claim 2, characterized in that: The arc-shaped truss unit (31) comprises four arc-shaped columns (311), and cross bars (6) are fixedly connected between the arc-shaped columns (311). The plurality of arc-shaped truss units (31) are spliced ​​and assembled up and down to form an arc-shaped layer (3) with an integrated arc surface.

4. A mountain truss wind power structure and installation method thereof according to claim 3, characterized in that: The curved surface layer (3) is composed of four curved truss units (31), and the arc segment angle of each curved truss unit is equally divided, and together form an angle of 30 degrees with the horizontal plane.

5. A mountain truss wind power structure and installation method thereof according to claim 4, characterized in that: The tops and bottoms of the vertical columns (211), the curved columns (311) and the supporting columns (41) in the vertical layer (2), the curved surface layer (3) and the base layer (4) are all provided with integrally molded annular steel plates, and the annular steel plates are provided with threaded holes for connection and assembly.

6. A mountain truss wind power structure and installation method thereof according to claim 4, characterized in that: The truss units in the vertical layer (2), the curved surface layer (3) and the base layer (4) are fixedly connected by welding.

7. A mountain truss wind power structure and installation method thereof according to claim 5, characterized in that: The vertical truss units (21), the arc-shaped truss units (31) and the supporting columns (41), and each independent truss unit is provided with a plurality of diagonal bracing rods (7).

8. A mountain truss wind power structure and installation method thereof according to claim 1, characterized in that: The top of the uppermost vertical truss unit (21) on the vertical layer (2) is fixedly connected to the fan sleeve (5) via a plurality of connecting rods (9), and an operation and maintenance ladder (8) is provided at the bottom center of the fan sleeve (5).

9. A method for installing a mountain truss wind power structure according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1, casting a plurality of vertical truss units (21), arc truss units (31) and four supporting columns (41), and transporting them to the installation site for assembly; S2. First, pour the foundation of the wind turbine at the construction site, and then install the four supporting columns (41) at an angle of 60 degrees to the ground. During installation, the four supporting columns (41) are tilted in the same direction and are all set toward the center point of the bottom of the wind turbine tower (5); S3, assembling each truss unit at the construction site, including the vertical truss unit (21) and the arc truss unit (31), jacking or hoisting the assembled truss unit to a truss unit height using a crane or a jacking device, and sequentially installing a plurality of vertical truss units (21) and a plurality of arc truss units (31) from top to bottom, wherein the arc surfaces of the arc truss units (31) from top to bottom together form an inverse arc section, wherein the inverse arc section forms an angle of 30 degrees with the horizontal plane, and can be fixed by welding or bolts during installation; S4, after assembling one truss unit, continue to lift or hoist it to a height greater than one truss unit, assemble the second truss unit below the first truss unit, and repeat the above steps to complete the assembly of the truss units in sequence; S5 After the truss unit is assembled from top to bottom, the height of the truss structure is adjusted under the action of a jacking device or a lifting device, and the tops of the four supporting columns (41) at the bottom are aligned and assembled with the bottoms of the arc-shaped truss units (31), thereby completing the assembly of the wind turbine truss.

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